A high-speed digital network connection, usually between a home or small business and a telecommunications vendor, providing an always-up direct connection to an Internet Service Provider (ISP) . It can be either asymmetric where the upstream and downstream speeds are dissimilar, or symmetric where the upstream and downstream speeds are the same.
DIGITAL SUBSCRIBER LINE (DSL)
Meaning of DIGITAL SUBSCRIBER LINE (DSL) in English
Josh's Network English Glossary. Английский словарь Josh's Network. 2012